Crucible and cupel tongs



(NoModeL) W. E. JUDSON.

Crucible and. Gupel Tongs.

No. 232,977. Patented Oct. 5, 1880.

W V I s ww fm enwq Unrren STATES PATENT Price.

WVILLIAM E. JUDSON, OF CLEVELAND, OHIO.

CRUCIBLE AND CUPEL TONGS.

SPECIFICATION forming part of Letters Patent No. 232,977, dated October5, 1880. Application filed March 9, 1880. (No model.)

To all whom tt may concern:

Be it known that I, WILLIAM E. JUDsoN, of Cleveland, in the county ofGuyahoga and State of Ohio, have invented a new and useful Improvementin Crucible and Gupel Tongs, and I do hereby declare that the followingis a full and exact description of the same, reference being had to theaccompanying drawings, and to the letters of reference marked thereon.

My invention relates to certain improvements in tongs designed forlaboratory use in lifting and holding crucibles, cupels, or any similardevices used in chemical or laboratory work; and the particularin'lprovcinents are in the peculiar form and arrangement of the parts bymeans of which the motions of the fingers and hand are transmitted fromthe handles to the grasping-jaws without any increased pressure beyondthat exerted by the grasp of the hand, the parallel rods joining twoextremities elfecting this result, as will be seen by reference to theaccompanying drawings, in which- Figure l is a perspective viewot'myimproved tongs, and Fig. 3 a modified form of the grasping-jaws which Iintend to use and form to adapt the tongs t0 difi'erently-shapedcrucibles, cupels, or scorilicrs, 850., or to any other uses to whichthe tongs may be put.

In Fig. l, A is the handle for the fingers of the right hand, andB thatfor the thumb. At 0 C these handles are socketed into the rods D D,which, in turn, are fastened by the connecting links or hinges E E.

Thejaws G G are firmly attached to the ends of rods, as shown, or theymay be cast all in one piece with the rods, and the jaws may befour-pronged, as shown, or as in Fig.2. In fact, I do not limit myselfto any particular form of the jaws, but design to make them in any shapeadapted to the class of work they are intended to perform.

The advantages of the invention are in the construction of the parallelrods and their hinged connecting-links, by means of which the pressureexerted at thejaws G G is identical with that atA B, and a nicety ofpressure can be attained in lifting delicate cupels and like chemicalapparatus which'would be impossible with aform of lever-tongs where thepressure is multiplied; and these tongs can be used in more confinedspaces than would be possible with those pivoted and opening and closingfrom the center or a point approximating thereto.

Anysnitable material may be used in making these tongs, though I preferspringsteel for thejaws and rods and brass for the connectinglinks andhandles.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

1. In tongs for laboratory or assaying uses, the parallel revolving rodsD D, with sockets G U to receive the handles A B, respectively,substantially as described and shown.

2. A crucible or cupel tongs having the handles A B and jaws G Gconnected by parallel revolving rods D D, operated in the manner and forthe purposes set forth and described.

3. The combination of the handles A B, hinges or links E E, rods D D,and jaws G G. operating as and for the purposes set forth and described.

4.. In tongs for laboratory or assaying uses, the jaws G G, constructedas described, and connected to the parallel revolving rods D D,substantially as described and shown.

This specification signed and witnessed this 11th day of February, 1880.

'WILLIAM E. JUDSON.

WVitnesses:

S. M. WoLoo'r'r, H. MoL. HARDING.

